I recently downloaded FG2016.1.2 and like 2016.1.1, you cannot select variants of certain aircraft such as B777 or the B747. The only way I have found of successfully doing this, is by using the old FGRUN launcher. I was told this would be fixed in the latest release but unfortunately hasn't.

yes, the problem was fixed in 2016.2.0 and should have made it to the 2016.2 release...

"You get more air close to the ground," said Angalo. "I read that in a book. You get lots of air low down, and not much when you go up.""Why not?" said Gurder."Dunno. It's frightened of heights, I guess."